deniskuzZ commented on code in PR #6206:
URL: https://github.com/apache/hive/pull/6206#discussion_r2615182159
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ql/src/java/org/apache/hadoop/hive/ql/exec/tez/HiveSplitGenerator.java:
##########
@@ -303,17 +303,14 @@ public List<Event> initialize() throws Exception {
int availableSlots = getAvailableSlotsCalculator().getAvailableSlots();
- if (HiveConf.getLongVar(conf, HiveConf.ConfVars.MAPRED_MIN_SPLIT_SIZE,
1) <= 1) {
- // broken configuration from mapred-default.xml
- final long blockSize =
conf.getLongBytes(DFSConfigKeys.DFS_BLOCK_SIZE_KEY,
- DFSConfigKeys.DFS_BLOCK_SIZE_DEFAULT);
- final long minGrouping = conf.getLong(
- TezMapReduceSplitsGrouper.TEZ_GROUPING_SPLIT_MIN_SIZE,
- TezMapReduceSplitsGrouper.TEZ_GROUPING_SPLIT_MIN_SIZE_DEFAULT);
- final long preferredSplitSize = Math.min(blockSize / 2, minGrouping);
- HiveConf.setLongVar(jobConf,
HiveConf.ConfVars.MAPRED_MIN_SPLIT_SIZE, preferredSplitSize);
- LOG.info("The preferred split size is " + preferredSplitSize);
- }
+ final long blockSize =
conf.getLongBytes(DFSConfigKeys.DFS_BLOCK_SIZE_KEY,
+ DFSConfigKeys.DFS_BLOCK_SIZE_DEFAULT);
+ final long minGrouping = conf.getLong(
+ TezMapReduceSplitsGrouper.TEZ_GROUPING_SPLIT_MIN_SIZE,
+ TezMapReduceSplitsGrouper.TEZ_GROUPING_SPLIT_MIN_SIZE_DEFAULT);
+ final long preferredSplitSize = Math.min(blockSize / 2, minGrouping);
+ HiveConf.setLongVar(jobConf, HiveConf.ConfVars.MAPRED_MIN_SPLIT_SIZE,
preferredSplitSize);
Review Comment:
`MAPRED_MIN_SPLIT_SIZE` is being calculated only when not explicitly set by
user. I don't follow the change here
HIVE-10746: Hive 1.2.0+Tez produces 1-byte FileSplits from
mapred.TextInputFormat
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